Impurity removal device for cement powder

Abstract

The utility model relates to the technical field of cement impurity removal equipment, in particular to an impurity removal device for cement powder. When particle impurities in cement powder are screened out, caked cement powder is crushed, and waste of the cement powder is reduced; comprising a machine frame, a feeding hopper fixedly installed on the machine frame, two rotating rollers rotationally installed on the machine frame, a screen belt arranged on the rotating rollers in a sleeving mode and a driving motor providing power for rotation of one set of rotating rollers, the bottom discharging end of the feeding hopper is in close contact with the top end face of the screen belt, and two first collecting hoppers are fixedly installed on the machine frame; the two first collecting hoppers are both located between the upper end face and the lower end face of the screen belt, feeding ports of the two first collecting hoppers are located under the discharging end of the feeding hopper, and the discharging ends of the two first collecting hoppers extend towards the lower portions of the two sides of the machine frame respectively.

Description

Technical Field

[0001] The utility model relates to the technical field of cement impurity removal equipment, in particular to an impurity removal device for cement powder Background Art

[0002] As is well known, fineness refers to the overall fineness of cement particles. The finer the cement particles, the larger the surface area reacting with water, so the hydration reaction rate is faster and more complete, and the early strength is also higher; after crushing and grinding, some particulate impurities are doped in the powdery cement material, and the cement powder needs to be subjected to impurity removal treatment

[0003] For example, the Chinese utility model patent CN202983874U discloses a powder impurity removal device, including a filtering box. The filtering box is cylindrical, and two filtering partition plates are arranged inside the filtering box. Each filtering partition plate has filter holes, and the aperture of the filter holes in the lower filtering partition plate is larger than that of the filter holes in the upper filtering partition plate. Its structure is simple, the impurity removal effect is good, and the impurity removal efficiency is high

[0004] However, it is found that the following defects exist: the cement powder after preliminary crushing and grinding has strong water absorption, causing some cement powder to agglomerate. The traditional impurity removal device directly screens out this part of the agglomerated cement powder together with the particulate impurities, resulting in waste of cement powder and having certain limitations in use Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides an impurity removal device for cement powder, which can crush the agglomerated cement powder while screening out the particulate impurities in the cement powder, reducing the waste of cement powder

[0006] To achieve the above object, the utility model provides the following technical solution: an impurity removal device for cement powder, including a frame, a feeding hopper fixedly installed on the frame, two rotating rollers rotatably installed on the frame, a screen belt sleeved on the rotating rollers, and a driving motor for providing power for the rotation of one group of rotating rollers. The bottom discharge end of the feeding hopper is in close contact with the top surface of the screen belt. Two first collecting hoppers are fixedly installed on the frame, and both of the two first collecting hoppers are located between the upper and lower end faces of the screen belt. The feeding ports on the two first collecting hoppers are located directly below the discharge end of the feeding hopper, and the discharge ends of the two first collecting hoppers extend downward to both sides of the frame respectively

[0007] Preferably, the screen belt includes a plurality of equidistantly arranged warp threads and a plurality of equidistantly arranged weft threads. Adjacent warp threads and weft threads enclose square screen holes; further, the screen belt is preferably a flexible and plastic metal mesh belt; the warp threads and weft threads can be made of stainless steel wires, and can also be made of fiber wires or other threads with certain toughness, strength and plasticity

[0008] Preferably, it further includes an elastic vibration exciter, which includes a mounting plate fixedly installed on the outer wall of the feeding hopper, a rotating shaft rotatably installed on the mounting plate, and an elastic reset member. The rotating shaft penetrates the feeding hopper. A plurality of evenly distributed vibration rods are installed on the rotating shaft. The end of the vibration rod is inserted into the corresponding square sieve holes. The elastic reset member is used for the self-resetting of the rotating shaft. Further, the central axis of the rotating shaft is perpendicularly arranged to the traveling direction of the screen belt; the end of the vibration rod extending into the square sieve hole is arranged in an arc shape; the depth of the vibration rod extending into the square sieve hole is 0.3 - 0.6 mm; the elastic reset member can adopt a torsion spring or other equivalent members with the function of driving the rotating shaft to reset.

[0009] Preferably, the elastic reset member includes a lever fixedly installed on the rotating shaft, a rotating rod hingedly installed on the mounting plate, and a spring sleeved on the rotating rod. A through hole allowing the rotating rod to pass through is provided on the lever. The rotating rod and the lever are elastically connected by the spring; further, one end of the spring abuts against the lever, and the other end of the spring is fixedly connected to the end of the rotating rod.

[0010] Preferably, there are two groups of elastic vibration exciters, which are respectively installed on both sides inside the feeding hopper. The included angle between the vibration rods on the elastic vibration exciters and the top surface of the screen belt is 15 - 75°.

[0011] Further, the vibration rod is inclined towards the side of the traveling direction of the screen belt.

[0012] Preferably, a slag discharge port is provided on the feeding hopper, and a sealing baffle is slidably installed up and down at the slag discharge port; further, a limit bolt is screwed on the feeding hopper, and the sealing baffle is locked to the feeding hopper through the limit bolt.

[0013] Preferably, a supporting plate is installed on the frame. The top of the supporting plate is in close contact with the bottom on the upper side of the screen belt. A second aggregate hopper for collecting the residual cement powder carried by the screen belt is installed on the frame.

[0014] Preferably, a driving shaft is rotatably installed inside the feeding hopper. A plurality of stirring rods are provided on the driving shaft. The driving motor is fixedly installed on the frame, and the driving motor provides power for the rotation of the driving shaft. The driving shaft is in transmission connection with a group of rollers; further, the driving shaft is synchronously transmission-connected with one of the rollers through a transmission belt or a transmission chain, etc.

[0015] Beneficial effects

[0016] Compared with the prior art, the utility model provides a cement powder impurity removal device, which has the following beneficial effects: the cement powder impurity removal device puts the cement powder into the upper hopper, and the screen belt rotates synchronously with the roller. When the screen belt moves from the bottom of the upper hopper, the cement powder is screened by the screen belt and falls into the inner and outer discharge of the first collecting hopper, while the screened impurities and cement powder agglomerates gather at the connection between the upper hopper and the screen belt. The friction of the screen belt on the agglomerated cement powder during the movement causes the cement powder agglomerates to break up. While screening out the granular impurities in the cement powder, the agglomerated cement powder is broken up to avoid the cement powder agglomerates and impurities being screened out together, thereby effectively reducing the waste of cement powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0018] Figure 2 It is a schematic diagram of the top plan structure of the utility model.

[0019] Figure 3 The utility model Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle.

[0020] Figure 4 The utility model Figure 2 Schematic diagram of the cross-sectional structure at BB in the middle.

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the elastic vibrator of the utility model.

[0022] Figure 6 The utility model Figure 1 Schematic diagram of the partial enlarged structure at point C in the middle.

[0023] Figure 7 The utility model Figure 3 Schematic diagram of the local enlarged structure at point D in the middle.

[0024] Figure 8 The utility model Figure 4 Schematic diagram of the local enlarged structure at point E in the middle.

[0025] Markings in the attached drawings: 1. frame; 2. upper hopper; 3. roller; 4. screen belt; 5. driving motor; 6. first collecting hopper; 7. warp; 8. weft; 9. square sieve hole; 10. mounting plate; 11. rotating shaft; 12. vibration rod; 13. lever; 14. rotating rod; 15. spring; 16. through-hole; 17. slag discharge port; 18. sealing plate; 19. supporting plate; 20. second collecting hopper; 21. driving shaft; 22. stirring rod. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] Example 1

[0030] Please refer to Figures 1-4 A cement powder impurity removal device comprises a frame 1, an upper hopper 2 fixedly mounted on the frame 1, two rollers 3 rotatably mounted on the frame 1, a screen belt 4 sleeved on the rollers 3, and a driving motor 5 providing power for the rotation of one group of rollers 3. The bottom discharge end of the upper hopper 2 is in close contact with the top surface of the screen belt 4. Two first collecting hoppers 6 are fixedly mounted on the frame 1. The two first collecting hoppers 6 are both located between the upper and lower end surfaces of the screen belt 4. The feed ports on the two first collecting hoppers 6 are located directly below the discharge end of the upper hopper 2. The discharge ends of the two first collecting hoppers 6 extend to the lower sides of the frame 1 respectively.

[0031] Please refer to Figure 3 ; A slag discharge port 17 is provided on the upper hopper 2, and a baffle plate 18 is slidably installed at the slag discharge port 17; further, a limiting bolt is screwed on the upper hopper 2, and the baffle plate 18 is locked with the upper hopper 2 through the limiting bolt; the slag discharge port 17 is located on the opposite side of the travel direction of the screen belt 4 on the upper hopper 2.

[0032] Specifically, a supporting plate 19 is installed on the frame 1, and the top of the supporting plate 19 is in close contact with the bottom of the upper side of the screen belt 4. A second collecting hopper 20 for collecting residual cement powder carried by the screen belt 4 is installed on the frame 1.

[0033] The cement powder impurity removal device provided in this embodiment, when a large amount of granular impurities are accumulated in the upper hopper 2, the sealing plate 18 is opened, and the driving motor 5 drives the roller 3 to flip, so that the granular impurities are conveyed by the screen belt 4 and then discharged, which can greatly improve the cleaning efficiency of the impurities screened in the upper hopper 2; when the screen belt 4 is moving normally, please refer to Figure 3In the direction of the arrow, it is inevitable that the screen belt 4 carries some cement powder. The material supporting plate 19 can prevent this part of the cement powder from directly falling to the ground. The cement powder at the material supporting plate 19 is sent into the second aggregate hopper 20 under the drive of the screen belt 4. The second aggregate hopper 20 centrally collects the cement powder, further reducing the waste of cement powder.

[0034] Embodiment 2

[0035] The impurity removal device for cement powder provided in Embodiment 1 is further optimized. Specifically, please refer to Figure 5 or Figure 6 ; The screen belt 4 includes a plurality of warp threads 7 evenly distributed at equal intervals and a plurality of weft threads 8 evenly distributed at equal intervals. The adjacent warp threads 7 and weft threads 8 enclose square sieve holes 9; Further, the screen belt 4 is preferably a flexible and plastic metal mesh belt; The warp threads 7 and weft threads 8 can be made of stainless steel wires, and the warp threads 7 and weft threads 8 can also be made of fiber filaments or other filaments with certain toughness, strength and plasticity.

[0036] Specifically, please refer to Figure 5 and Figure 8 , and further includes an elastic vibration generator. The elastic vibration generator includes a mounting plate 10 fixedly installed on the outer wall of the feeding hopper 2, a rotating shaft 11 rotatably installed on the mounting plate 10, and an elastic reset member. The rotating shaft 11 penetrates through the feeding hopper 2. A plurality of groups of evenly distributed vibration rods 12 are installed on the rotating shaft 11. The end of the vibration rod 12 is inserted into the corresponding square sieve hole 9. The elastic reset member is used for the rotating shaft 11 to reset itself. Further, the central axis of the rotating shaft 11 is perpendicularly arranged to the traveling direction of the screen belt 4; The end of the vibration rod 12 extending into the square sieve hole 9 is arranged in an arc shape; The depth of the vibration rod 12 extending into the square sieve hole 9 is 0.3 - 0.6 mm; The elastic reset member can be a torsion spring, or other equivalent members with the function of driving the rotating shaft 11 to reset.

[0037] The elastic reset member includes a lever 13 fixedly installed on the rotating shaft 11, a rotating rod 14 hingedly installed on the mounting plate 10, and a spring 15 sleeved on the rotating rod 14. A through hole 16 allowing the rotating rod 14 to pass through is provided on the lever 13. The rotating rod 14 and the lever 13 are elastically connected by the spring 15; Further, one end of the spring 15 abuts against the lever 13, and the other end of the spring 15 is fixedly connected to the end of the rotating rod 14; When the vibration rod 12 contacts the warp thread 7 on the screen belt 4, the rotating shaft 11 rotates, the lever 13 rotates synchronously with the rotating shaft 11, and the spring 15 is compressed. When the vibration rod 12 is separated from the warp thread 7, the spring 15 can promote the rapid reset of the rotating shaft 11. This elastic reset member can shorten the reset time of the vibration rod 12 and ensure the elastic contact between the vibration rod 12 and the warp thread 7 on the screen belt 4.

[0038] Specifically, please refer to Figure 3 and Figure 7There are two groups of elastic vibrators, which are respectively installed on both sides of the upper hopper 2. The vibrating rod 12 on the elastic vibrator forms an angle of 15-75° with the top surface of the screen belt 4; further, the vibrating rod 12 is inclined toward one side of the travel direction of the screen belt 4.

[0039] The cement powder impurity removal device provided in the present embodiment is that after the cement powder falls on the screen belt 4, the cement powder is screened by the square screen holes 9 formed by the warp lines 7 and the weft lines 8, and the aperture of the square screen holes 9 can be appropriately adjusted according to the material particle size of the cement powder; when the screen belt 4 moves, the vibration rod 12 frequently contacts the warp lines 7 on the screen belt 4, so that the screen belt 4 at the upper hopper 2 forms a high-frequency and low-amplitude vibration effect up and down, and under the action of vibration, the screening effect and screening efficiency of the cement powder can be further improved, and the vibration rod 12 can also remove the cement powder remaining in the square screen holes 9; and the two groups of elastic vibrators can act synchronously on the screen belt 4 area below the upper hopper 2, further improving the vibration effect of the screen belt 4, and the angle between the vibration rod 12 and the screen belt 4 can avoid the vibration rod 12 from interfering with the normal movement of the screen belt 4.

[0040] Example 3

[0041] The cement powder impurity removal device provided in Example 2 is further optimized. For details, please refer to Figures 1-3 A drive shaft 21 is rotatably installed in the upper hopper 2, and a plurality of stirring rods 22 are provided on the drive shaft 21. A drive motor 5 is fixedly installed on the frame 1. The drive motor 5 provides power for the rotation of the drive shaft 21. The drive shaft 21 is transmission-connected to a roller 3; further, the drive shaft 21 is synchronously transmission-connected to one of the rollers 3 via a transmission belt or a transmission chain.

[0042] The cement powder impurity removal device provided in this embodiment has a driving motor 5 that can drive the rotating shaft 11 to rotate. When the rotating shaft 11 rotates, the cement powder in the upper hopper 2 is stirred by the stirring rod 22, so that the cement powder in the upper hopper 2 is in a loose state to ensure that the cement powder is smoothly screened out by the screen belt 4; when the driving motor 5 stops running, the driving shaft 21 and the roller 3 both stop synchronously, and the driving shaft 21 and the roller 3 can be synchronously driven by one driving motor 5, and the structural layout is scientific and reasonable.

[0043] The use process of the cement powder impurity removal device provided by the utility model is as follows: put the cement powder into the upper hopper 2, drive the motor 5 to drive the corresponding roller 3 to rotate, and the screen belt 4 rotates synchronously with the roller 3. When the screen belt 4 moves from the bottom of the upper hopper 2, the cement powder is screened by the screen belt 4 and falls into the first collecting hopper 6 for internal and external discharge, while the screened impurities and cement powder agglomerates gather at the connection between the upper hopper 2 and the screen belt 4 (please refer to Figure 3At the position F in the figure, at the same time, the elastic vibrator forms a vibration effect with high frequency and low amplitude on the screen belt 4. During the movement of the screen belt 4, the frictional force, vibration force on the caked cement powder, and the extrusion force between the screen belt 4 and the feeding hopper 2 cause the caked cement powder to break, and the screened cement powder can be collected by the first aggregate hopper 6 and then discharged outside.

[0044] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Claims

1. A cement powder impurity removal device, characterized in that: The invention comprises a frame (1), an upper hopper (2) fixedly mounted on the frame (1), two rollers (3) rotatably mounted on the frame (1), a screen belt (4) sleeved on the rollers (3), and a driving motor (5) for providing power for the rotation of one group of rollers (3); the bottom discharge end of the upper hopper (2) is in close contact with the top end surface of the screen belt (4); two first collecting hoppers (6) are fixedly mounted on the frame (1); the two first collecting hoppers (6) are both located between the upper and lower end surfaces of the screen belt (4); the feed ports on the two first collecting hoppers (6) are located directly below the discharge end of the upper hopper (2); and the discharge ends of the two first collecting hoppers (6) extend downward on both sides of the frame (1).

2. The cement powder impurity removal device according to claim 1, characterized in that: The screen belt (4) comprises a plurality of equally spaced warps (7) and a plurality of equally spaced wefts (8), and adjacent warps (7) and wefts (8) enclose a square screen hole (9).

3. The cement powder impurity removal device according to claim 2, characterized in that: The invention also comprises an elastic vibrator, which comprises a mounting plate (10) fixedly mounted on the outer wall of the upper hopper (2), a rotating shaft (11) rotatably mounted on the mounting plate (10), and an elastic reset member, wherein the rotating shaft (11) passes through the upper hopper (2), a plurality of groups of evenly distributed vibration rods (12) are mounted on the rotating shaft (11), the ends of the vibration rods (12) are inserted into corresponding square sieve holes (9), and the elastic reset member is used for the rotating shaft (11) to reset itself.

4. The cement powder impurity removal device according to claim 3, characterized in that: The elastic reset member comprises a lever (13) fixedly mounted on the rotating shaft (11), a rotating rod (14) hingedly mounted on the mounting plate (10), and a spring (15) sleeved on the rotating rod (14); the lever (13) is provided with a through hole (16) for allowing the rotating rod (14) to pass through; the rotating rod (14) and the lever (13) are elastically connected via the spring (15).

5. The cement powder impurity removal device according to claim 3, characterized in that: There are two groups of elastic vibrators, which are respectively installed on both sides of the upper hopper (2). The vibrating rods (12) on the elastic vibrators form an angle of 15-75 degrees with the top surface of the screen belt (4).

6. The cement powder impurity removal device according to claim 1, characterized in that: The upper hopper (2) is provided with a slag discharge port (17), and a sealing plate (18) is slidably mounted up and down at the slag discharge port (17).

7. The cement powder impurity removal device according to claim 1, characterized in that: A support plate (19) is mounted on the frame (1), the top of the support plate (19) being in close contact with the bottom of the upper side of the screen belt (4), and a second collecting hopper (20) for collecting residual cement powder carried by the screen belt (4) is mounted on the frame (1).

8. The cement powder impurity removal device according to claim 1, characterized in that: A drive shaft (21) is rotatably mounted in the upper hopper (2), and a plurality of stirring rods (22) are provided on the drive shaft (21). The drive motor (5) is fixedly mounted on the frame (1), and the drive motor (5) provides power for the rotation of the drive shaft (21). The drive shaft (21) is transmission-connected to a group of rollers (3).

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